SELECT element: Introduce light-weight OPTION iterater.

third_party/WebKit/Source/core/html/HTMLSelectElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLSelectElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLSelectElement.cpp b/third_party/WebKit/Source/core/html/HTMLSelectElement.cpp
index 66ac70079a4f7e7abd5d27a3cc4243c82bca4bba..d16d9dfe24f399cff7499f2f96d7ddc12ebf4f05 100644
--- a/third_party/WebKit/Source/core/html/HTMLSelectElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLSelectElement.cpp
@@ -887,10 +887,7 @@ void HTMLSelectElement::resetToDefaultSelection(ResetReason reason)
     // We can't use HTMLSelectElement::options here because this function is
     // called in Node::insertedInto and Node::removedFrom before invalidating
     // node collections.
-    for (auto& item : listItems()) {
-        if (!isHTMLOptionElement(item))
-            continue;
-        HTMLOptionElement* option = toHTMLOptionElement(item);
+    for (const auto& option : optionList()) {
         if (option->selected()) {
             if (lastSelectedOption) {
                 lastSelectedOption->setSelectedState(false);